Design Patterns
A design pattern solves a common software engineering problem. Patterns are abstract（抽象） designs, not code. When you adopt a design, you adapt the general pattern to your specific needs.
[设计模式解决了一个通用的软件工程问题，模式是抽象的设计而不是代码。当你采用了一个设计， 你就会将一般的模式适应你的特殊需求。]
No matter what type of app you are creating, you should know the fundamental design patterns used in the frameworks. Understanding design patterns helps you use frameworks more effectively and allows you to write programs that are more reusable, more extensible, and easier to change.
[不管你正在创建的App是那种类型，你都应该知道在Frameworks中使用的基本设计模式。 理解设计模式将帮助更加高效的使用Frameworks，你编写的项目也将高可复用、高可扩展以及更加容易修改]
THE END !
2012-10-12